Large Antique Early 19th Century Oil Painting ‘Portrait of a Lady’

Large Antique Early 19th Century Oil Painting ‘Portrait of a Lady’ 
English School, oil on canvas, indistinctly signed. The canvas has some slack & may benefit from re-stretching,  craquelure present consistent with age & some slight damage to corners of frame, as shown. 
Dimensions Cm’s (including 
frame) 
WIDTH 82
HEIGHT 100